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CCSP · Question #286
CCSP Question #286: Real Exam Question with Answer & Explanation
The correct answer is A: 1. Fiber-optic lines, like other physical media, operate at Layer 1 (the Physical Layer) of the OSI model, responsible for the transmission and reception of raw bit streams.
Submitted by hans_de· Apr 18, 2026Cloud Platform & Infrastructure Security
Question
Fiber-optic lines are considered part of layer __________ of the OSI model. Response:
Options
- A1
- B3
- C5
- D7
Explanation
Fiber-optic lines, like other physical media, operate at Layer 1 (the Physical Layer) of the OSI model, responsible for the transmission and reception of raw bit streams.
Common mistakes.
- B. Layer 3 (Network Layer) deals with logical addressing (IP addresses) and routing, not physical transmission media.
- C. Layer 5 (Session Layer) establishes, manages, and terminates sessions between applications.
- D. Layer 7 (Application Layer) provides network services to end-user applications.
Concept tested. OSI model Physical Layer
Reference. https://learn.microsoft.com/en-us/training/modules/network-fundamentals/7-network-layers
Topics
#OSI Model#Physical Layer#Network Infrastructure#Fiber Optics
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